/**** 
* Classes
****/ 
// Bullet class
var Bullet = Container.expand(function () {
	var self = Container.call(this);
	var bulletGraphics = self.attachAsset('bullet', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = -10;
	self.update = function () {
		self.y += self.speed;
	};
});
// Piggy class
var Piggy = Container.expand(function () {
	var self = Container.call(this);
	var piggyGraphics = self.attachAsset('piggy', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 2;
	self.update = function () {
		self.y += self.speed;
	};
});
// Assets will be automatically created and loaded by the LK engine
// Player class
var Player = Container.expand(function () {
	var self = Container.call(this);
	var playerGraphics = self.attachAsset('player', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 5;
	self.update = function () {
		// Player movement logic
		if (dragNode) {
			self.x = dragNode.x;
			self.y = dragNode.y;
		}
	};
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x000000 // Init game with black background 
});

/**** 
* Game Code
****/ 
var player = game.addChild(new Player());
player.x = 2048 / 2;
player.y = 2732 - 100;
var bullets = [];
var piggies = [];
var scoreTxt = new Text2('0', {
	size: 150,
	fill: "#ffffff"
});
LK.gui.top.addChild(scoreTxt);
game.update = function () {
	// Player movement logic
	if (dragNode) {
		dragNode.x = x;
		dragNode.y = y;
	}
	// Bullet logic
	for (var i = bullets.length - 1; i >= 0; i--) {
		var bullet = bullets[i];
		if (bullet.y < 0) {
			bullet.destroy();
			bullets.splice(i, 1);
		} else {
			for (var j = piggies.length - 1; j >= 0; j--) {
				var piggy = piggies[j];
				if (bullet.intersects(piggy)) {
					bullet.destroy();
					bullets.splice(i, 1);
					piggy.destroy();
					piggies.splice(j, 1);
					LK.setScore(LK.getScore() + 1);
					scoreTxt.setText(LK.getScore());
					break;
				}
			}
		}
	}
	// Piggy logic
	for (var i = piggies.length - 1; i >= 0; i--) {
		var piggy = piggies[i];
		if (piggy.y > 2732) {
			piggy.destroy();
			piggies.splice(i, 1);
		} else if (piggy.intersects(player)) {
			LK.effects.flashScreen(0xff0000, 1000);
			LK.showGameOver();
		}
	}
	// Spawn piggies
	if (LK.ticks % 120 == 0) {
		var piggy = new Piggy();
		piggy.x = Math.random() * 2048;
		piggy.y = 0;
		piggies.push(piggy);
		game.addChild(piggy);
	}
};
// Define the direction of the player
var direction = {
	up: false,
	down: false,
	left: false,
	right: false
};
// Listen to keydown event
window.addEventListener('keydown', function (event) {
	switch (event.key) {
		case 'ArrowUp':
			direction.up = true;
			break;
		case 'ArrowDown':
			direction.down = true;
			break;
		case 'ArrowLeft':
			direction.left = true;
			break;
		case 'ArrowRight':
			direction.right = true;
			break;
	}
});
// Listen to keyup event
window.addEventListener('keyup', function (event) {
	switch (event.key) {
		case 'ArrowUp':
			direction.up = false;
			break;
		case 'ArrowDown':
			direction.down = false;
			break;
		case 'ArrowLeft':
			direction.left = false;
			break;
		case 'ArrowRight':
			direction.right = false;
			break;
	}
});
game.update = function () {
	// Player movement logic
	if (direction.up) {
		player.y -= player.speed;
	}
	if (direction.down) {
		player.y += player.speed;
	}
	if (direction.left) {
		player.x -= player.speed;
	}
	if (direction.right) {
		player.x += player.speed;
	}
	// Rest of the game logic...
};

===================================================================
--- original.js
+++ change.js
@@ -109,16 +109,61 @@
 		piggies.push(piggy);
 		game.addChild(piggy);
 	}
 };
-var dragNode = null;
-game.down = function (x, y, obj) {
-	dragNode = player;
+// Define the direction of the player
+var direction = {
+	up: false,
+	down: false,
+	left: false,
+	right: false
 };
-game.up = function (x, y, obj) {
-	dragNode = null;
-	var bullet = new Bullet();
-	bullet.x = player.x;
-	bullet.y = player.y;
-	bullets.push(bullet);
-	game.addChild(bullet);
+// Listen to keydown event
+window.addEventListener('keydown', function (event) {
+	switch (event.key) {
+		case 'ArrowUp':
+			direction.up = true;
+			break;
+		case 'ArrowDown':
+			direction.down = true;
+			break;
+		case 'ArrowLeft':
+			direction.left = true;
+			break;
+		case 'ArrowRight':
+			direction.right = true;
+			break;
+	}
+});
+// Listen to keyup event
+window.addEventListener('keyup', function (event) {
+	switch (event.key) {
+		case 'ArrowUp':
+			direction.up = false;
+			break;
+		case 'ArrowDown':
+			direction.down = false;
+			break;
+		case 'ArrowLeft':
+			direction.left = false;
+			break;
+		case 'ArrowRight':
+			direction.right = false;
+			break;
+	}
+});
+game.update = function () {
+	// Player movement logic
+	if (direction.up) {
+		player.y -= player.speed;
+	}
+	if (direction.down) {
+		player.y += player.speed;
+	}
+	if (direction.left) {
+		player.x -= player.speed;
+	}
+	if (direction.right) {
+		player.x += player.speed;
+	}
+	// Rest of the game logic...
 };
\ No newline at end of file